One of the big draws of a WDW trip for me is the food. I love love love the signature restaurants! My thoughts and rankings based on the ones I've eaten at:
1) California Grill - from start to finish, the experience is amazing. I recommend going up to the bar a little before your reservation and having a drink (or two). It's a really cool vibe and the views are the best on property. I travel with big wine drinkers (we're from the Napa Valley, California so we know a thing or two about a good glass), and Cali Grill has a very extensive wine list. I believe almost everything they offer by the bottle is available by the glass as well, which is quite incredible. The food is very, very good. Since it's that Asian-pacific-Californian fusion style, there's quite a lot of variety, from sushi to seafood to meat. I've been there twice and had exceptional meals both times. Staying for the fireworks after (or during if you plan your timing right) is the cherry on top.
2/3) Monsieur Paul and Jiko - I think at this point we're splitting hairs. Both are exceptional but offer quite dramatically different styles and flavors. M. Paul for a more elegant, upscale French atmosphere; Jiko for more vibrant, colorful, playful African fare. As awkward as it sounds, my only meal at M. Paul was a solo one (dinner at that). I recall I had beef as an entrée and it was delicious; melted in your mouth. The menu, on the other hand, was a little small and didn't have the variety I expected from a signature French restaurant. It's a much more intimate atmosphere, though, so if you go, plan for a quieter evening. Jiko, however, is more open and colorful. They have a bigger wine list with some exotic labels and the menu seemed to have more options. I believe we all had vastly different entrees, too, which makes for sharing and sampling a tasty endeavor!
4) Citrico's - Slightly more casual vibe (open kitchen, big counter seating area, prominent bar) with excellent food. I've eaten here twice and have not been disappointed. I've had outstanding appetizers, salads, and desserts. That's not to knock the entrees in any way, it's just that the apps and salads I've ordered have been my meals and have been incredible!
5) Flying Fish - I'm not a big seafood guy, so I can't speak to the quality or selection of fish here, but the people I ate with said this was their favorite restaurant on property. If they still have a braised short rib appetizer, that's a must! We ordered 3!
Final thoughts - I didn't include Victoria & Albert's as that doesn't seem like a fair comparison but that was a special treat, for sure. We did the 7-course option and it was one of the best meals I've ever had. As for the ones mentioned above, I have not eaten at Artist Point, Tiffins, Hollywood Brown Derby, Narcoosee, Yachtsman, or Le Celier yet. I DID eat at Nomad Lounge, however, which is the bar/lounge next to Tiffins in Animal Kingdom, and this is now a MUST DO every trip. Until Avatar-land opens, which is imminent, this is the best kept secret on property. It's tucked away in the corner and has insane food and drinks. I went there to relax and check it out and ended up staying for 3 hours. I had some spicy wings and kobe sliders which were mouthwatering. I can only imagine that Tiffins is equally as impressive. As for Hollywood Brown Derby, I've only had drinks on their little side, outdoor patio and that was cool. I had a great Moscow mule and enjoyed the people-watching.
Hope this helps and happy eating!
Thanks 
i will be eating this! Thanks for sharing 
